Interest Rates: Changes in Canadian interest rates, especially those set by the Bank of Canada, significantly impact bond yields and thus the value of ZBI.TO, as it tracks Canadian government bonds. Higher rates generally lower bond prices.

Inflation Expectations: Rising inflation erodes the real value of fixed-income securities. Increased expectations of inflation typically lead to lower bond prices, affecting ZBI.TO negatively.

Credit Risk: Although ZBI.TO primarily holds Canadian government bonds, which are considered very safe, perceived changes in the Canadian government's creditworthiness can still affect investor sentiment and bond prices.

Economic Growth: Stronger economic growth can lead to higher interest rates and inflation expectations, both of which can put downward pressure on bond prices and ZBI.TO.

Supply and Demand: Market dynamics, including the supply of new Canadian government bonds and investor demand for fixed-income assets, influence the price of ZBI.TO. Increased supply or decreased demand can lower the price.

Geopolitical Events: Global events, such as political instability or economic crises, can impact investor confidence and lead to shifts in demand for safe-haven assets like Canadian government bonds, influencing the price of ZBI.TO.

Currency Fluctuations: Movements in the Canadian dollar (CAD) relative to other currencies can indirectly affect the attractiveness of Canadian government bonds to foreign investors, thereby impacting demand and the price of ZBI.TO.

Liquidity: The ease with which ZBI.TO units can be bought and sold can influence its price. Lower liquidity may result in wider bid-ask spreads and potentially greater price volatility.

ETF Management Fees: The expense ratio of ZBI.TO, which covers management and operating costs, reduces the overall return to investors and indirectly affects its price relative to the underlying bonds.